Department of Electronic Engineering, Micro/Nano Devices &packaging Lab., Kwangwoon University, 447-1, Wolgye-Dong, Nowon Gu, Seoul, 139-701, Korea.
Sci Rep. 2016 Sep 12;6:33125. doi: 10.1038/srep33125.
For this paper, a fully integrated and highly miniaturized electrochemical sensor was designed and fabricated on a silicon substrate. A solvothermal-assisted reduced graphene oxide named "TRGO" was then successfully micro-patterned using a lithography technique, followed by the electrodeposition of bismuth (Bi) on the surface of the micro-patterned TRGO for the electrochemical detection of heavy metal ions. The fully integrated electrochemical micro-sensor was then measured and evaluated for the detection of cadmium and lead-heavy metal ions in an acetic-acid buffered solution using the square wave anodic stripping voltammetry (SWASV) technique. The fabricated micro-sensor exhibited a linear detection range of 1.0 μg L(-1) to 120.0 μg L(-1) for both of the metal ions, and detection limits of 0.4 μg L(-1) and 1.0 μg L(-1) were recorded for the lead and cadmium (S/N = 3), respectively. Drinking-water samples were used for the practical assessment of the fabricated micro-sensor, and it showed an acceptable detection performance regarding the metal ions.
本文设计并制作了一种完全集成和高度微型化的电化学传感器，该传感器在硅衬底上实现。然后，使用光刻技术成功地对一种称为“TRGO”的溶剂热还原氧化石墨烯进行微图案化处理，接着在微图案化 TRGO 的表面上电沉积铋（Bi），用于电化学检测重金属离子。使用方波阳极溶出伏安法（SWASV）技术，对完全集成的电化学微传感器在乙酸缓冲溶液中对镉和铅重金属离子的检测进行了测量和评估。所制备的微传感器对两种金属离子的线性检测范围为 1.0μg L(-1)至 120.0μg L(-1)，检测限分别为 0.4μg L(-1)和 1.0μg L(-1)（S/N=3）。该制备的微传感器用于实际评估饮用水样中金属离子的检测性能，结果令人满意。
